[Lowfer] Oh, CRAP!

[Peter Cranwell]

There are a lot of board makers on the inrternet.  I have never made one but 
I am in the process with a project I'm working on.  I would not volunteer 
unti I have some experience but If you have the time & inclination you can 
lay out the board & send the files to the board makers.  Some supply their 
own software or you could use the free version of Eagle if the board is less 
than 3X4 inches.

Pete
----- Original Message ----- 
From: "KD7JYK DM09" <kd7jyk at earthlink.net>
To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands" 
<lowfer at mailman.qth.net>
Sent: Sunday, August 31, 2008 5:42 AM
Subject: [Lowfer] Oh, CRAP!


Check THIS out:

New Radio Frequency Found

This is pretty cool for those of you who might like a higher frequency
sideband channel to talk on, maybe use sometimes as a AM broadcast
channel.

Section (§) 15.225 Operation within the band 13.110 - 14.010 MHz.

"(a) The field strength of any emissions within the band 13.553-13.567
MHz shall not exceed 15,848 microvolts/meter at 30 meters."

(b) Within the bands 13.410-13.553 MHz and 13.567-13.710 MHz, the
field strength of any emissions shall not exceed 334 microvolts/meter
at 30 meters.

(c) Within the bands 13.110-13.410 MHz and 13.710-14.010 MHz the field
strength of any emissions shall not exceed 106 microvolts/meter at 30
meters.

(d) The field strength of any emissions appearing outside of the
13.110-14.010 MHz band shall not exceed the general radiated emission
limits in § 15.209.

Ok, this is how it breaks down:

13.553-13.567 MHz could be a nice place to go and talk on SSB?  Using
a vertical or dipole antenna.  Maybe someone would do a broadcast
there.  It is not a bad frequency in the daytime.

  I think a CB radio is rated at 10,000 uV/3 m.  So, 15,848 uV/30 m is
a way higher power level than the CB I think.  Got to re check Part 15
to be sure?  That power level at a measurement of 30 meters is high.

Compare to the CB band:  in Part 15;

Section (§) 15.227 Operation within the band 26.96 - 27.28 MHz.

(a) The field strength of any emission within this band shall not
exceed 10,000 microvolts/meter at 3 meters. The emission limit in this
paragraph is based on measurement instrumentation employing an average
detector. The provisions in Section 15.35 for limiting peak emissions
apply.

Ok now see?  I got the stuff to backwards engineer the input power to
the antenna based upon the above 15,848 uV/30 m.  But I would have to
do a PC search here to locate my notes and equations.  Field strength
equations.

(Little off topic note: if any of you know someone who makes printed
circuit boards.  I am interested in making kits.  But we do not have
to hurry and rush it up.  I still have some files to run and tweak on
the designs.  But will be looking for a partner to collaborate with.
I write help text also for the builders and so, this can help the
partner to understand the kit and it's use.  If you know someone, just
drop me a line at my message box.  I use LTspice software as my design
software and all of my circuits have LTspice analysis files with them.)


------------------------------------

See if someone is in the SW pirates CHAT!!
http://www.alfalima.net/chatroom

The SW Pirates FORUM!!
http://www.alfalima.net/forum

Addresses of SW pirates group
Related Link: http://www.alfalima.net/start
Post a message: SWpirates at yahoogroups.com
Subscribe: SWpirates-subscribe at yahoogroups.com
Unsubscribe: SWpirates-unsubscribe at yahoogroups.com
List owner: SWpirates-owner at yahoogroups.com

URL SW- pirates  group: http://www.egroups.com/group/SWpirates Yahoo! Groups
Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/SWpirates/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/SWpirates/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:SWpirates-digest at yahoogroups.com
    mailto:SWpirates-fullfeatured at yahoogroups.com

<*> To unsubscribe from this group, send an email to:
    SWpirates-unsubscribe at yahoogroups.com

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/

_______________________________________________
>From the Lowfer mailing list
Send messages to: Lowfer at mailman.qth.net
To sub/unsub visit: http://mailman.qth.net/mailman/listinfo/lowfer